December weather forecast
Fall Brook, PA

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Weather in December

The first month of the winter, December, is also an icy month in Fall Brook, Pennsylvania, with an average temperature fluctuating between 34.5°F (1.4°C) and 25.2°F (-3.8°C).

Temperature

The onset of December comes with a shift in the average high-temperature, falling from a chilly 43.9°F (6.6°C) in November to an icy 34.5°F (1.4°C). Fall Brook encounters a steady low-temperature average of 25.2°F (-3.8°C) throughout the month of December.

Humidity

In December, the average relative humidity in Fall Brook is 85%.

Rainfall

In Fall Brook, during December, the rain falls for 8.9 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, there are 156.3 rainfall days, and 29.25" (743mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, in Fall Brook, Pennsylvania, it is snowing for 11.8 days. Throughout December, 5.71" (145mm) of snow is accumulated. Throughout the year, in Fall Brook, there are 63.2 snowfall days, and 33.23" (844mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of December in Fall Brook, sunrise is at 7:16 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:47 pm EST.

Sunshine

January and December, with an average of 3.2h of sunshine, are months with the least sunshine in Fall Brook.

UV index

The months with the lowest UV index in Fall Brook are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 1 during December translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

How cold is December in Fall Brook?

December temperatures in Fall Brook vary between a high-temperature of 34.5°F (1.4°C) and a low-temperature of 25.2°F (-3.8°C).

What is the average humidity in December in Fall Brook?

In Fall Brook, the average relative humidity in December is 85%.

How many days does it rain in December in Fall Brook?

In Fall Brook, Pennsylvania, during December, the rain falls for 8.9 days and regularly aggregates up to 2.13" (54mm) of precipitation.

How many days does it snow in December in Fall Brook?

In Fall Brook, in December, during 11.8 snowfall days, 5.71" (145mm) of snow is typically accumulated.

What is the month with the shortest days in Fall Brook?

The month with the shortest days in Fall Brook, Pennsylvania, is December, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Fall Brook?

The average day length in December in Fall Brook, Pennsylvania, is 9h and 13min.

When are sunrise and sunset in December in Fall Brook?

On the first day of December, sunrise is at 7:16 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:47 pm EST.

What are the months with the least sunshine in Fall Brook?

The months with the least sunshine in Fall Brook are January and December, with an average of 3.2h of sunshine.

How many hours of sunshine does Fall Brook have in December?

In December, the average sunshine duration in Fall Brook is 3.2h.

When is the lowest UV index in Fall Brook?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Fall Brook, Pennsylvania.

What is the UV index reading in December in Fall Brook?

The average daily maximum UV index in December in Fall Brook, Pennsylvania, is 1. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Fall Brook, PA

Average temperature in December - Fall Brook, PA
  • Average high temperature in December: 34.5°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in December: 25.2°F

The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).

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Average pressure in December
Fall Brook, PA

Average pressure in December - Fall Brook, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Fall Brook, PA

Average wind speed in December - Fall Brook, PA
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in December
Fall Brook, PA

Average humidity in December - Fall Brook, PA
  • Average humidity in December: 85%

The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).

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Average rainfall in December
Fall Brook, PA

Average rainfall in December - Fall Brook, PA
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (1.73").

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Average rainfall days in December
Fall Brook, PA

Average rainfall days in December - Fall Brook, PA
  • Average rainfall days in December: 8.9 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is February (6.5 days).

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Average snowfall in December
Fall Brook, PA

Average snowfall in December - Fall Brook, PA
  • Average snowfall in December: 5.71"

The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Fall Brook, PA

Average snowfall days in December - Fall Brook, PA
  • Average snowfall days in December: 11.8 days

The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Fall Brook, PA

Average daylight in December / Average sunshine in December - Fall Brook, PA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).

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Average sunshine days in December
Fall Brook, PA

Average sunshine days in December - Fall Brook, PA
  • Average sunshine days in December: 13.6 days

The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (9.8 days).

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Average UV index in December
Fall Brook, PA

Average UV index in December - Fall Brook, PA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Fall Brook, PA

Average cloud cover in December - Fall Brook, PA
  • Average cloud cover in December: 68

The months with the most cloud cover are January and December (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 39).

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Average visibility in December
Fall Brook, PA

Average visibility in December - Fall Brook, PA
  • Average visibility in December: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).

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Fall Brook, Pennsylvania, USA

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